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Which do we recommend?

Which Best Buy products cost the least to run?

Which should you avoid?

Which? found that a boiler with the right features such as size, controls and thermostat-type can help you save energy no matter what your boiler needs are. Tell us what kind of boiler you want, and we'll help you find it.

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Best BuysThe Which? Best Buy award is given to
products with high total test scores that perform consistently well in
our rigorous lab tests and excel in all key areas.

Energy SaversWe award the Energy Saver logo to
products that our testing shows are very energy efficient, meaning
they'll cost you less to run.

Don't BuysThe Which? Don't Buy logo alerts you
to the products that performed extremely poorly in one or more key
areas of our tests.

Overall energy efficiencyBoilers that have an efficiency of 88% or more and are therefore eligible for installation according to the Building Regulations Part L are awarded 5 stars for efficiency.

Reliability scoreBased on the results of our annual boiler reliability survey of Which? members. This applies only to boilers up to six years old, bought between 1 April 2008 and the end of May 2014.

FuelChoose between the type of fuel that you will use to heat your home and provide hot water.

Boiler typeChoose between a combination boiler which provides heat for central heating and direct hot water on demand, or a system or heat-only boiler that both heat the hot water for a storage cylinder.

Heat outputChoose the heat output that you need - a gas installer can advise you

Boiler efficiencyChoose your boiler by how energy efficient it is

Hidden user controlsSelect if you want hidden controls

Central heating temperature controlSelect if you want set your own heating level

Price
Prices are sourced from plumbing trade suppliers and include VAT. The price you pay may depend on the discounts your installer has with their supplier.